Coil Parameters and Improvements of Sensing Coils for Coin Recognizer
Zhou Xiao-chuan · Journal of Magnetic Materials and Devices · 2010
Coin recobnizer is a kind of detecting and identifying device of coins based on electric eddy current sensor. Eddy current sensor is a key component for improving coin recognition accuracy. As the key part of the eddy current sensor,the coil parameters and its layout has direct impact on the coin recognition accuracy. In this work,the effect of eddy current sensor coil parameters,including the core,coil diameter,and their layout on the recognition accuracy was analyzed,and qualitative relationship between them was obtained,supplying a design referense for the optimizing of the sensor. The program was used in HT998(3)P/T payphone machine,and obviously increased the coin identification accuracy.